A method of populating page tables of an executing workload during migration of the executing workload from a source host to a destination host includes the steps of: before resuming the workload at the destination host, populating the page tables of the workload at the destination host, wherein the populating comprises inserting mappings from virtual addresses of the workload to physical addresses of system memory of the destination host; and upon completion of populating the page tables, resuming the workload at the destination host.
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2. The method of claim 1, wherein the workload is a virtual machine (VM), the page tables are nested page tables of a virtualization software layer, the first and second sets of virtual addresses are guest physical page numbers of the VM, and the first and second sets of physical addresses are machine page numbers of the system memory of the destination host.
4. The method of claim 1, wherein the first set of the migrated memory pages are memory pages that are modified during the migration of the workload.
5. The method of claim 4, wherein each of the first set of physical addresses references a memory page that is larger than each of the first set of the migrated memory pages, and the larger memory pages include the first set of the migrated memory pages and other memory pages that are read from during the migration of the workload.
9. The non-transitory computer readable medium of claim 8, wherein the workload is a virtual machine (VM), the page tables of are nested page tables of a virtualization software layer, the first and second sets of virtual addresses are guest physical page numbers of the VM, and the first and second sets of physical addresses are machine page numbers of the system memory of the destination host.
11. The non-transitory computer readable medium of claim 8, wherein the first set of the migrated memory pages are memory pages that are modified during the migration of the workload.
12. The non-transitory computer readable medium of claim 11, wherein each of the first set of physical addresses references a memory page that is larger than each of the first set of the migrated memory pages, and the larger memory pages include the first set of the migrated memory pages and other memory pages that are read from during the migration of the workload.
16. The computer system of claim 15, wherein the workload is a virtual machine (VM), the page tables are nested page tables of a virtualization software layer, the first and second sets of virtual addresses are guest physical page numbers of the VM, and the first and second sets of physical addresses are machine page numbers of the system memory of the destination host.
18. The computer system of claim 15, wherein the first set of the migrated memory pages are memory pages that are modified during the migration of the workload.
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July 23, 2021
February 21, 2023
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